includes/Skin.php

   1 <?php
   2 /**
   3  * Base class for all skins.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * @defgroup Skins Skins
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         die( 1 );
  29 }
  30
  31 /**
  32  * The main skin class that provide methods and properties for all other skins.
  33  * This base class is also the "Standard" skin.
  34  *
  35  * See docs/skin.txt for more information.
  36  *
  37  * @ingroup Skins
  38  */
  39 abstract class Skin extends ContextSource {
  40         protected $skinname = 'standard';
  41         protected $mRelevantTitle = null;
  42         protected $mRelevantUser = null;
  43
  44         /**
  45          * Fetch the set of available skins.
  46          * @return array associative array of strings
  47          */
  48         static function getSkinNames() {
  49                 global $wgValidSkinNames;
  50                 static $skinsInitialised = false;
  51
  52                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  53                         # Get a list of available skins
  54                         # Build using the regular expression '^(.*).php$'
  55                         # Array keys are all lower case, array value keep the case used by filename
  56                         #
  57                         wfProfileIn( __METHOD__ . '-init' );
  58
  59                         global $wgStyleDirectory;
  60
  61                         $skinDir = dir( $wgStyleDirectory );
  62
  63                         # while code from www.php.net
  64                         while ( false !== ( $file = $skinDir->read() ) ) {
  65                                 // Skip non-PHP files, hidden files, and '.dep' includes
  66                                 $matches = array();
  67
  68                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  69                                         $aSkin = $matches[1];
  70                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  71                                 }
  72                         }
  73                         $skinDir->close();
  74                         $skinsInitialised = true;
  75                         wfProfileOut( __METHOD__ . '-init' );
  76                 }
  77                 return $wgValidSkinNames;
  78         }
  79
  80         /**
  81          * Fetch the skinname messages for available skins.
  82          * @return array of strings
  83          */
  84         static function getSkinNameMessages() {
  85                 $messages = array();
  86                 foreach( self::getSkinNames() as $skinKey => $skinName ) {
  87                         $messages[] = "skinname-$skinKey";
  88                 }
  89                 return $messages;
  90         }
  91
  92         /**
  93          * Fetch the list of usable skins in regards to $wgSkipSkins.
  94          * Useful for Special:Preferences and other places where you
  95          * only want to show skins users _can_ use.
  96          * @return array of strings
  97          */
  98         public static function getUsableSkins() {
  99                 global $wgSkipSkins;
 100
 101                 $usableSkins = self::getSkinNames();
 102
 103                 foreach ( $wgSkipSkins as $skip ) {
 104                         unset( $usableSkins[$skip] );
 105                 }
 106
 107                 return $usableSkins;
 108         }
 109
 110         /**
 111          * Normalize a skin preference value to a form that can be loaded.
 112          * If a skin can't be found, it will fall back to the configured
 113          * default (or the old 'Classic' skin if that's broken).
 114          * @param $key String: 'monobook', 'standard', etc.
 115          * @return string
 116          */
 117         static function normalizeKey( $key ) {
 118                 global $wgDefaultSkin;
 119
 120                 $skinNames = Skin::getSkinNames();
 121
 122                 if ( $key == '' || $key == 'default' ) {
 123                         // Don't return the default immediately;
 124                         // in a misconfiguration we need to fall back.
 125                         $key = $wgDefaultSkin;
 126                 }
 127
 128                 if ( isset( $skinNames[$key] ) ) {
 129                         return $key;
 130                 }
 131
 132                 // Older versions of the software used a numeric setting
 133                 // in the user preferences.
 134                 $fallback = array(
 135                         0 => $wgDefaultSkin,
 136                         1 => 'nostalgia',
 137                         2 => 'cologneblue'
 138                 );
 139
 140                 if ( isset( $fallback[$key] ) ) {
 141                         $key = $fallback[$key];
 142                 }
 143
 144                 if ( isset( $skinNames[$key] ) ) {
 145                         return $key;
 146                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 147                         return $wgDefaultSkin;
 148                 } else {
 149                         return 'vector';
 150                 }
 151         }
 152
 153         /**
 154          * Factory method for loading a skin of a given type
 155          * @param $key String: 'monobook', 'standard', etc.
 156          * @return Skin
 157          */
 158         static function &newFromKey( $key ) {
 159                 global $wgStyleDirectory;
 160
 161                 $key = Skin::normalizeKey( $key );
 162
 163                 $skinNames = Skin::getSkinNames();
 164                 $skinName = $skinNames[$key];
 165                 $className = "Skin{$skinName}";
 166
 167                 # Grab the skin class and initialise it.
 168                 if ( !MWInit::classExists( $className ) ) {
 169
 170                         if ( !defined( 'MW_COMPILED' ) ) {
 171                                 // Preload base classes to work around APC/PHP5 bug
 172                                 $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 173                                 if ( file_exists( $deps ) ) {
 174                                         include_once( $deps );
 175                                 }
 176                                 require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 177                         }
 178
 179                         # Check if we got if not failback to default skin
 180                         if ( !MWInit::classExists( $className ) ) {
 181                                 # DO NOT die if the class isn't found. This breaks maintenance
 182                                 # scripts and can cause a user account to be unrecoverable
 183                                 # except by SQL manipulation if a previously valid skin name
 184                                 # is no longer valid.
 185                                 wfDebug( "Skin class does not exist: $className\n" );
 186                                 $className = 'SkinVector';
 187                                 if ( !defined( 'MW_COMPILED' ) ) {
 188                                         require_once( "{$wgStyleDirectory}/Vector.php" );
 189                                 }
 190                         }
 191                 }
 192                 $skin = new $className( $key );
 193                 return $skin;
 194         }
 195
 196         /** @return string skin name */
 197         public function getSkinName() {
 198                 return $this->skinname;
 199         }
 200
 201         /**
 202          * @param $out OutputPage
 203          */
 204         function initPage( OutputPage $out ) {
 205                 wfProfileIn( __METHOD__ );
 206
 207                 $this->preloadExistence();
 208
 209                 wfProfileOut( __METHOD__ );
 210         }
 211
 212         /**
 213          * Preload the existence of three commonly-requested pages in a single query
 214          */
 215         function preloadExistence() {
 216                 $user = $this->getUser();
 217
 218                 // User/talk link
 219                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 220
 221                 // Other tab link
 222                 if ( $this->getTitle()->isSpecialPage() ) {
 223                         // nothing
 224                 } elseif ( $this->getTitle()->isTalkPage() ) {
 225                         $titles[] = $this->getTitle()->getSubjectPage();
 226                 } else {
 227                         $titles[] = $this->getTitle()->getTalkPage();
 228                 }
 229
 230                 $lb = new LinkBatch( $titles );
 231                 $lb->setCaller( __METHOD__ );
 232                 $lb->execute();
 233         }
 234
 235         /**
 236          * Get the current revision ID
 237          *
 238          * @return Integer
 239          */
 240         public function getRevisionId() {
 241                 return $this->getOutput()->getRevisionId();
 242         }
 243
 244         /**
 245          * Whether the revision displayed is the latest revision of the page
 246          *
 247          * @return Boolean
 248          */
 249         public function isRevisionCurrent() {
 250                 $revID = $this->getRevisionId();
 251                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 252         }
 253
 254         /**
 255          * Set the "relevant" title
 256          * @see self::getRelevantTitle()
 257          * @param $t Title object to use
 258          */
 259         public function setRelevantTitle( $t ) {
 260                 $this->mRelevantTitle = $t;
 261         }
 262
 263         /**
 264          * Return the "relevant" title.
 265          * A "relevant" title is not necessarily the actual title of the page.
 266          * Special pages like Special:MovePage use set the page they are acting on
 267          * as their "relevant" title, this allows the skin system to display things
 268          * such as content tabs which belong to to that page instead of displaying
 269          * a basic special page tab which has almost no meaning.
 270          *
 271          * @return Title
 272          */
 273         public function getRelevantTitle() {
 274                 if ( isset($this->mRelevantTitle) ) {
 275                         return $this->mRelevantTitle;
 276                 }
 277                 return $this->getTitle();
 278         }
 279
 280         /**
 281          * Set the "relevant" user
 282          * @see self::getRelevantUser()
 283          * @param $u User object to use
 284          */
 285         public function setRelevantUser( $u ) {
 286                 $this->mRelevantUser = $u;
 287         }
 288
 289         /**
 290          * Return the "relevant" user.
 291          * A "relevant" user is similar to a relevant title. Special pages like
 292          * Special:Contributions mark the user which they are relevant to so that
 293          * things like the toolbox can display the information they usually are only
 294          * able to display on a user's userpage and talkpage.
 295          * @return User
 296          */
 297         public function getRelevantUser() {
 298                 if ( isset($this->mRelevantUser) ) {
 299                         return $this->mRelevantUser;
 300                 }
 301                 $title = $this->getRelevantTitle();
 302                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 303                         $rootUser = strtok( $title->getText(), '/' );
 304                         if ( User::isIP( $rootUser ) ) {
 305                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 306                         } else {
 307                                 $user = User::newFromName( $rootUser, false );
 308                                 if ( $user && $user->isLoggedIn() ) {
 309                                         $this->mRelevantUser = $user;
 310                                 }
 311                         }
 312                         return $this->mRelevantUser;
 313                 }
 314                 return null;
 315         }
 316
 317         /**
 318          * Outputs the HTML generated by other functions.
 319          * @param $out OutputPage
 320          */
 321         abstract function outputPage( OutputPage $out = null );
 322
 323         /**
 324          * @param $data array
 325          * @return string
 326          */
 327         static function makeVariablesScript( $data ) {
 328                 if ( $data ) {
 329                         return Html::inlineScript(
 330                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 331                         );
 332                 } else {
 333                         return '';
 334                 }
 335         }
 336
 337         /**
 338          * Make a <script> tag containing global variables
 339          *
 340          * @deprecated in 1.19
 341          * @param $unused
 342          * @return string HTML fragment
 343          */
 344         public static function makeGlobalVariablesScript( $unused ) {
 345                 global $wgOut;
 346
 347                 wfDeprecated( __METHOD__, '1.19' );
 348
 349                 return self::makeVariablesScript( $wgOut->getJSVars() );
 350         }
 351
 352         /**
 353          * Get the query to generate a dynamic stylesheet
 354          *
 355          * @return array
 356          */
 357         public static function getDynamicStylesheetQuery() {
 358                 global $wgSquidMaxage;
 359
 360                 return array(
 361                                 'action' => 'raw',
 362                                 'maxage' => $wgSquidMaxage,
 363                                 'usemsgcache' => 'yes',
 364                                 'ctype' => 'text/css',
 365                                 'smaxage' => $wgSquidMaxage,
 366                         );
 367         }
 368
 369         /**
 370          * Add skin specific stylesheets
 371          * Calling this method with an $out of anything but the same OutputPage
 372          * inside ->getOutput() is deprecated. The $out arg is kept
 373          * for compatibility purposes with skins.
 374          * @param $out OutputPage
 375          * @delete
 376          */
 377         abstract function setupSkinUserCss( OutputPage $out );
 378
 379         /**
 380          * TODO: document
 381          * @param $title Title
 382          * @return String
 383          */
 384         function getPageClasses( $title ) {
 385                 $numeric = 'ns-' . $title->getNamespace();
 386
 387                 if ( $title->isSpecialPage() ) {
 388                         $type = 'ns-special';
 389                         // bug 23315: provide a class based on the canonical special page name without subpages
 390                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 391                         if ( $canonicalName ) {
 392                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 393                         } else {
 394                                 $type .= ' mw-invalidspecialpage';
 395                         }
 396                 } elseif ( $title->isTalkPage() ) {
 397                         $type = 'ns-talk';
 398                 } else {
 399                         $type = 'ns-subject';
 400                 }
 401
 402                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 403
 404                 return "$numeric $type $name";
 405         }
 406
 407         /**
 408          * This will be called by OutputPage::headElement when it is creating the
 409          * <body> tag, skins can override it if they have a need to add in any
 410          * body attributes or classes of their own.
 411          * @param $out OutputPage
 412          * @param $bodyAttrs Array
 413          */
 414         function addToBodyAttributes( $out, &$bodyAttrs ) {
 415                 // does nothing by default
 416         }
 417
 418         /**
 419          * URL to the logo
 420          * @return String
 421          */
 422         function getLogo() {
 423                 global $wgLogo;
 424                 return $wgLogo;
 425         }
 426
 427         /**
 428          * @return string
 429          */
 430         function getCategoryLinks() {
 431                 global $wgUseCategoryBrowser;
 432
 433                 $out = $this->getOutput();
 434                 $allCats = $out->getCategoryLinks();
 435
 436                 if ( !count( $allCats ) ) {
 437                         return '';
 438                 }
 439
 440                 $embed = "<li>";
 441                 $pop = "</li>";
 442
 443                 $s = '';
 444                 $colon = $this->msg( 'colon-separator' )->escaped();
 445
 446                 if ( !empty( $allCats['normal'] ) ) {
 447                         $t = $embed . implode( "{$pop}{$embed}" , $allCats['normal'] ) . $pop;
 448
 449                         $msg = $this->msg( 'pagecategories', count( $allCats['normal'] ) )->escaped();
 450                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 451                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 452                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 453                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 454                 }
 455
 456                 # Hidden categories
 457                 if ( isset( $allCats['hidden'] ) ) {
 458                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 459                                 $class = ' mw-hidden-cats-user-shown';
 460                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 461                                 $class = ' mw-hidden-cats-ns-shown';
 462                         } else {
 463                                 $class = ' mw-hidden-cats-hidden';
 464                         }
 465
 466                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 467                                 $this->msg( 'hidden-categories', count( $allCats['hidden'] ) )->escaped() .
 468                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}" , $allCats['hidden'] ) . $pop . '</ul>' .
 469                                 '</div>';
 470                 }
 471
 472                 # optional 'dmoz-like' category browser. Will be shown under the list
 473                 # of categories an article belong to
 474                 if ( $wgUseCategoryBrowser ) {
 475                         $s .= '<br /><hr />';
 476
 477                         # get a big array of the parents tree
 478                         $parenttree = $this->getTitle()->getParentCategoryTree();
 479                         # Skin object passed by reference cause it can not be
 480                         # accessed under the method subfunction drawCategoryBrowser
 481                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 482                         # Clean out bogus first entry and sort them
 483                         unset( $tempout[0] );
 484                         asort( $tempout );
 485                         # Output one per line
 486                         $s .= implode( "<br />\n", $tempout );
 487                 }
 488
 489                 return $s;
 490         }
 491
 492         /**
 493          * Render the array as a serie of links.
 494          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 495          * @return String separated by &gt;, terminate with "\n"
 496          */
 497         function drawCategoryBrowser( $tree ) {
 498                 $return = '';
 499
 500                 foreach ( $tree as $element => $parent ) {
 501                         if ( empty( $parent ) ) {
 502                                 # element start a new list
 503                                 $return .= "\n";
 504                         } else {
 505                                 # grab the others elements
 506                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 507                         }
 508
 509                         # add our current element to the list
 510                         $eltitle = Title::newFromText( $element );
 511                         $return .=  Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 512                 }
 513
 514                 return $return;
 515         }
 516
 517         /**
 518          * @return string
 519          */
 520         function getCategories() {
 521                 $out = $this->getOutput();
 522
 523                 $catlinks = $this->getCategoryLinks();
 524
 525                 $classes = 'catlinks';
 526
 527                 // Check what we're showing
 528                 $allCats = $out->getCategoryLinks();
 529                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 530                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 531
 532                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 533                         $classes .= ' catlinks-allhidden';
 534                 }
 535
 536                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 537         }
 538
 539         /**
 540          * This runs a hook to allow extensions placing their stuff after content
 541          * and article metadata (e.g. categories).
 542          * Note: This function has nothing to do with afterContent().
 543          *
 544          * This hook is placed here in order to allow using the same hook for all
 545          * skins, both the SkinTemplate based ones and the older ones, which directly
 546          * use this class to get their data.
 547          *
 548          * The output of this function gets processed in SkinTemplate::outputPage() for
 549          * the SkinTemplate based skins, all other skins should directly echo it.
 550          *
 551          * @return String, empty by default, if not changed by any hook function.
 552          */
 553         protected function afterContentHook() {
 554                 $data = '';
 555
 556                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 557                         // adding just some spaces shouldn't toggle the output
 558                         // of the whole <div/>, so we use trim() here
 559                         if ( trim( $data ) != '' ) {
 560                                 // Doing this here instead of in the skins to
 561                                 // ensure that the div has the same ID in all
 562                                 // skins
 563                                 $data = "<div id='mw-data-after-content'>\n" .
 564                                         "\t$data\n" .
 565                                         "</div>\n";
 566                         }
 567                 } else {
 568                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 569                 }
 570
 571                 return $data;
 572         }
 573
 574         /**
 575          * Generate debug data HTML for displaying at the bottom of the main content
 576          * area.
 577          * @return String HTML containing debug data, if enabled (otherwise empty).
 578          */
 579         protected function generateDebugHTML() {
 580                 global $wgShowDebug;
 581
 582                 $html = MWDebug::getDebugHTML( $this->getContext() );
 583
 584                 if ( $wgShowDebug ) {
 585                         $listInternals = $this->formatDebugHTML( $this->getOutput()->mDebugtext );
 586                         $html .= "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 587                                 $listInternals . "</ul>\n";
 588                 }
 589
 590                 return $html;
 591         }
 592
 593         /**
 594          * @param $debugText string
 595          * @return string
 596          */
 597         private function formatDebugHTML( $debugText ) {
 598                 global $wgDebugTimestamps;
 599
 600                 $lines = explode( "\n", $debugText );
 601                 $curIdent = 0;
 602                 $ret = '<li>';
 603
 604                 foreach ( $lines as $line ) {
 605                         $pre = '';
 606                         if ( $wgDebugTimestamps ) {
 607                                 $matches = array();
 608                                 if ( preg_match( '/^(\d+\.\d+ {1,3}\d+.\dM\s{2})/', $line, $matches ) ) {
 609                                         $pre = $matches[1];
 610                                         $line = substr( $line, strlen( $pre ) );
 611                                 }
 612                         }
 613                         $display = ltrim( $line );
 614                         $ident = strlen( $line ) - strlen( $display );
 615                         $diff = $ident - $curIdent;
 616
 617                         $display = $pre . $display;
 618                         if ( $display == '' ) {
 619                                 $display = "\xc2\xa0";
 620                         }
 621
 622                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 623                                 $ident = $curIdent;
 624                                 $diff = 0;
 625                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 626                         } else {
 627                                 $display = htmlspecialchars( $display );
 628                         }
 629
 630                         if ( $diff < 0 ) {
 631                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 632                         } elseif ( $diff == 0 ) {
 633                                 $ret .= "</li><li>\n";
 634                         } else {
 635                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 636                         }
 637                         $ret .= "<tt>$display</tt>\n";
 638
 639                         $curIdent = $ident;
 640                 }
 641
 642                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 643
 644                 return $ret;
 645         }
 646
 647         /**
 648          * This gets called shortly before the </body> tag.
 649          *
 650          * @return String HTML-wrapped JS code to be put before </body>
 651          */
 652         function bottomScripts() {
 653                 // TODO and the suckage continues. This function is really just a wrapper around
 654                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 655                 // up at some point
 656                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 657                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 658
 659                 return $bottomScriptText;
 660         }
 661
 662         /**
 663          * Text with the permalink to the source page,
 664          * usually shown on the footer of a printed page
 665          *
 666          * @return string HTML text with an URL
 667          */
 668         function printSource() {
 669                 $oldid = $this->getRevisionId();
 670                 if ( $oldid ) {
 671                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 672                 } else {
 673                         // oldid not available for non existing pages
 674                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 675                 }
 676                 return $this->msg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' )->text();
 677         }
 678
 679         /**
 680          * @return String
 681          */
 682         function getUndeleteLink() {
 683                 $action = $this->getRequest()->getVal( 'action', 'view' );
 684
 685                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 686                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 687                         $n = $this->getTitle()->isDeleted();
 688
 689
 690                         if ( $n ) {
 691                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 692                                         $msg = 'thisisdeleted';
 693                                 } else {
 694                                         $msg = 'viewdeleted';
 695                                 }
 696
 697                                 return $this->msg( $msg )->rawParams(
 698                                         Linker::linkKnown(
 699                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 700                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 701                                         )->text();
 702                         }
 703                 }
 704
 705                 return '';
 706         }
 707
 708         /**
 709          * @return string
 710          */
 711         function subPageSubtitle() {
 712                 global $wgLang;
 713                 $out = $this->getOutput();
 714                 $subpages = '';
 715
 716                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 717                         return $subpages;
 718                 }
 719
 720                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 721                         $ptext = $this->getTitle()->getPrefixedText();
 722                         if ( preg_match( '/\//', $ptext ) ) {
 723                                 $links = explode( '/', $ptext );
 724                                 array_pop( $links );
 725                                 $c = 0;
 726                                 $growinglink = '';
 727                                 $display = '';
 728
 729                                 foreach ( $links as $link ) {
 730                                         $growinglink .= $link;
 731                                         $display .= $link;
 732                                         $linkObj = Title::newFromText( $growinglink );
 733
 734                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 735                                                 $getlink = Linker::linkKnown(
 736                                                         $linkObj,
 737                                                         htmlspecialchars( $display )
 738                                                 );
 739
 740                                                 $c++;
 741
 742                                                 if ( $c > 1 ) {
 743                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 744                                                 } else  {
 745                                                         $subpages .= '&lt; ';
 746                                                 }
 747
 748                                                 $subpages .= $getlink;
 749                                                 $display = '';
 750                                         } else {
 751                                                 $display .= '/';
 752                                         }
 753                                         $growinglink .= '/';
 754                                 }
 755                         }
 756                 }
 757
 758                 return $subpages;
 759         }
 760
 761         /**
 762          * Returns true if the IP should be shown in the header
 763          * @return Bool
 764          */
 765         function showIPinHeader() {
 766                 global $wgShowIPinHeader;
 767                 return $wgShowIPinHeader && session_id() != '';
 768         }
 769
 770         /**
 771          * @return String
 772          */
 773         function getSearchLink() {
 774                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 775                 return $searchPage->getLocalURL();
 776         }
 777
 778         /**
 779          * @return string
 780          */
 781         function escapeSearchLink() {
 782                 return htmlspecialchars( $this->getSearchLink() );
 783         }
 784
 785         /**
 786          * @param $type string
 787          * @return string
 788          */
 789         function getCopyright( $type = 'detect' ) {
 790                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 791
 792                 if ( $type == 'detect' ) {
 793                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 794                                 $type = 'history';
 795                         } else {
 796                                 $type = 'normal';
 797                         }
 798                 }
 799
 800                 if ( $type == 'history' ) {
 801                         $msg = 'history_copyright';
 802                 } else {
 803                         $msg = 'copyright';
 804                 }
 805
 806                 if ( $wgRightsPage ) {
 807                         $title = Title::newFromText( $wgRightsPage );
 808                         $link = Linker::linkKnown( $title, $wgRightsText );
 809                 } elseif ( $wgRightsUrl ) {
 810                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 811                 } elseif ( $wgRightsText ) {
 812                         $link = $wgRightsText;
 813                 } else {
 814                         # Give up now
 815                         return '';
 816                 }
 817
 818                 // Allow for site and per-namespace customization of copyright notice.
 819                 $forContent = true;
 820
 821                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 822
 823                 $msgObj = $this->msg( $msg )->rawParams( $link );
 824                 if ( $forContent ) {
 825                         $msg = $msgObj->inContentLanguage()->text();
 826                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 827                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 828                         }
 829                         return $msg;
 830                 } else {
 831                         return $msgObj->text();
 832                 }
 833         }
 834
 835         /**
 836          * @return null|string
 837          */
 838         function getCopyrightIcon() {
 839                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 840
 841                 $out = '';
 842
 843                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 844                         $out = $wgCopyrightIcon;
 845                 } elseif ( $wgRightsIcon ) {
 846                         $icon = htmlspecialchars( $wgRightsIcon );
 847
 848                         if ( $wgRightsUrl ) {
 849                                 $url = htmlspecialchars( $wgRightsUrl );
 850                                 $out .= '<a href="' . $url . '">';
 851                         }
 852
 853                         $text = htmlspecialchars( $wgRightsText );
 854                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 855
 856                         if ( $wgRightsUrl ) {
 857                                 $out .= '</a>';
 858                         }
 859                 }
 860
 861                 return $out;
 862         }
 863
 864         /**
 865          * Gets the powered by MediaWiki icon.
 866          * @return string
 867          */
 868         function getPoweredBy() {
 869                 global $wgStylePath;
 870
 871                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 872                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 873                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 874                 return $text;
 875         }
 876
 877         /**
 878          * Get the timestamp of the latest revision, formatted in user language
 879          *
 880          * @return String
 881          */
 882         protected function lastModified() {
 883                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 884
 885                 # No cached timestamp, load it from the database
 886                 if ( $timestamp === null ) {
 887                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 888                 }
 889
 890                 if ( $timestamp ) {
 891                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 892                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 893                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 894                 } else {
 895                         $s = '';
 896                 }
 897
 898                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 899                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 900                 }
 901
 902                 return $s;
 903         }
 904
 905         /**
 906          * @param $align string
 907          * @return string
 908          */
 909         function logoText( $align = '' ) {
 910                 if ( $align != '' ) {
 911                         $a = " align='{$align}'";
 912                 } else {
 913                         $a = '';
 914                 }
 915
 916                 $mp = $this->msg( 'mainpage' )->escaped();
 917                 $mptitle = Title::newMainPage();
 918                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 919
 920                 $logourl = $this->getLogo();
 921                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 922
 923                 return $s;
 924         }
 925
 926         /**
 927          * Renders a $wgFooterIcons icon acording to the method's arguments
 928          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 929          * @param $withImage Bool|String: Whether to use the icon's image or output a text-only footericon
 930          * @return String HTML
 931          */
 932         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 933                 if ( is_string( $icon ) ) {
 934                         $html = $icon;
 935                 } else { // Assuming array
 936                         $url = isset($icon["url"]) ? $icon["url"] : null;
 937                         unset( $icon["url"] );
 938                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 939                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 940                         } else {
 941                                 $html = htmlspecialchars( $icon["alt"] );
 942                         }
 943                         if ( $url ) {
 944                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 945                         }
 946                 }
 947                 return $html;
 948         }
 949
 950         /**
 951          * Gets the link to the wiki's main page.
 952          * @return string
 953          */
 954         function mainPageLink() {
 955                 $s = Linker::linkKnown(
 956                         Title::newMainPage(),
 957                         $this->msg( 'mainpage' )->escaped()
 958                 );
 959
 960                 return $s;
 961         }
 962
 963         /**
 964          * @param $desc
 965          * @param $page
 966          * @return string
 967          */
 968         public function footerLink( $desc, $page ) {
 969                 // if the link description has been set to "-" in the default language,
 970                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 971                         // then it is disabled, for all languages.
 972                         return '';
 973                 } else {
 974                         // Otherwise, we display the link for the user, described in their
 975                         // language (which may or may not be the same as the default language),
 976                         // but we make the link target be the one site-wide page.
 977                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 978
 979                         return Linker::linkKnown(
 980                                 $title,
 981                                 $this->msg( $desc )->escaped()
 982                         );
 983                 }
 984         }
 985
 986         /**
 987          * Gets the link to the wiki's privacy policy page.
 988          * @return String HTML
 989          */
 990         function privacyLink() {
 991                 return $this->footerLink( 'privacy', 'privacypage' );
 992         }
 993
 994         /**
 995          * Gets the link to the wiki's about page.
 996          * @return String HTML
 997          */
 998         function aboutLink() {
 999                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1000         }
1001
1002         /**
1003          * Gets the link to the wiki's general disclaimers page.
1004          * @return String HTML
1005          */
1006         function disclaimerLink() {
1007                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1008         }
1009
1010         /**
1011          * Return URL options for the 'edit page' link.
1012          * This may include an 'oldid' specifier, if the current page view is such.
1013          *
1014          * @return array
1015          * @private
1016          */
1017         function editUrlOptions() {
1018                 $options = array( 'action' => 'edit' );
1019
1020                 if ( !$this->isRevisionCurrent() ) {
1021                         $options['oldid'] = intval( $this->getRevisionId() );
1022                 }
1023
1024                 return $options;
1025         }
1026
1027         /**
1028          * @param $id User|int
1029          * @return bool
1030          */
1031         function showEmailUser( $id ) {
1032                 if ( $id instanceof User ) {
1033                         $targetUser = $id;
1034                 } else {
1035                         $targetUser = User::newFromId( $id );
1036                 }
1037                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1038                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1039         }
1040
1041         /**
1042          * Return a fully resolved style path url to images or styles stored in the common folder.
1043          * This method returns a url resolved using the configured skin style path
1044          * and includes the style version inside of the url.
1045          * @param $name String: The name or path of a skin resource file
1046          * @return String The fully resolved style path url including styleversion
1047          */
1048         function getCommonStylePath( $name ) {
1049                 global $wgStylePath, $wgStyleVersion;
1050                 return "$wgStylePath/common/$name?$wgStyleVersion";
1051         }
1052
1053         /**
1054          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1055          * This method returns a url resolved using the configured skin style path
1056          * and includes the style version inside of the url.
1057          * @param $name String: The name or path of a skin resource file
1058          * @return String The fully resolved style path url including styleversion
1059          */
1060         function getSkinStylePath( $name ) {
1061                 global $wgStylePath, $wgStyleVersion;
1062                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1063         }
1064
1065         /* these are used extensively in SkinTemplate, but also some other places */
1066
1067         /**
1068          * @param $urlaction string
1069          * @return String
1070          */
1071         static function makeMainPageUrl( $urlaction = '' ) {
1072                 $title = Title::newMainPage();
1073                 self::checkTitle( $title, '' );
1074
1075                 return $title->getLocalURL( $urlaction );
1076         }
1077
1078         /**
1079          * @param $name string
1080          * @param $urlaction string
1081          * @return String
1082          */
1083         static function makeSpecialUrl( $name, $urlaction = '' ) {
1084                 $title = SpecialPage::getSafeTitleFor( $name );
1085                 return $title->getLocalURL( $urlaction );
1086         }
1087
1088         /**
1089          * @param $name string
1090          * @param $subpage string
1091          * @param $urlaction string
1092          * @return String
1093          */
1094         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1095                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1096                 return $title->getLocalURL( $urlaction );
1097         }
1098
1099         /**
1100          * @param $name string
1101          * @param $urlaction string
1102          * @return String
1103          */
1104         static function makeI18nUrl( $name, $urlaction = '' ) {
1105                 $title = Title::newFromText( wfMsgForContent( $name ) );
1106                 self::checkTitle( $title, $name );
1107                 return $title->getLocalURL( $urlaction );
1108         }
1109
1110         /**
1111          * @param $name string
1112          * @param $urlaction string
1113          * @return String
1114          */
1115         static function makeUrl( $name, $urlaction = '' ) {
1116                 $title = Title::newFromText( $name );
1117                 self::checkTitle( $title, $name );
1118
1119                 return $title->getLocalURL( $urlaction );
1120         }
1121
1122         /**
1123          * If url string starts with http, consider as external URL, else
1124          * internal
1125          * @param $name String
1126          * @return String URL
1127          */
1128         static function makeInternalOrExternalUrl( $name ) {
1129                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1130                         return $name;
1131                 } else {
1132                         return self::makeUrl( $name );
1133                 }
1134         }
1135
1136         /**
1137          * this can be passed the NS number as defined in Language.php
1138          * @param $name
1139          * @param $urlaction string
1140          * @param $namespace int
1141          * @return String
1142          */
1143         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1144                 $title = Title::makeTitleSafe( $namespace, $name );
1145                 self::checkTitle( $title, $name );
1146
1147                 return $title->getLocalURL( $urlaction );
1148         }
1149
1150         /**
1151          * these return an array with the 'href' and boolean 'exists'
1152          * @param $name
1153          * @param $urlaction string
1154          * @return array
1155          */
1156         static function makeUrlDetails( $name, $urlaction = '' ) {
1157                 $title = Title::newFromText( $name );
1158                 self::checkTitle( $title, $name );
1159
1160                 return array(
1161                         'href' => $title->getLocalURL( $urlaction ),
1162                         'exists' => $title->getArticleID() != 0,
1163                 );
1164         }
1165
1166         /**
1167          * Make URL details where the article exists (or at least it's convenient to think so)
1168          * @param $name String Article name
1169          * @param $urlaction String
1170          * @return Array
1171          */
1172         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1173                 $title = Title::newFromText( $name );
1174                 self::checkTitle( $title, $name );
1175
1176                 return array(
1177                         'href' => $title->getLocalURL( $urlaction ),
1178                         'exists' => true
1179                 );
1180         }
1181
1182         /**
1183          * make sure we have some title to operate on
1184          *
1185          * @param $title Title
1186          * @param $name string
1187          */
1188         static function checkTitle( &$title, $name ) {
1189                 if ( !is_object( $title ) ) {
1190                         $title = Title::newFromText( $name );
1191                         if ( !is_object( $title ) ) {
1192                                 $title = Title::newFromText( '--error: link target missing--' );
1193                         }
1194                 }
1195         }
1196
1197         /**
1198          * Build an array that represents the sidebar(s), the navigation bar among them
1199          *
1200          * @return array
1201          */
1202         function buildSidebar() {
1203                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1204                 wfProfileIn( __METHOD__ );
1205
1206                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1207
1208                 if ( $wgEnableSidebarCache ) {
1209                         $cachedsidebar = $wgMemc->get( $key );
1210                         if ( $cachedsidebar ) {
1211                                 wfProfileOut( __METHOD__ );
1212                                 return $cachedsidebar;
1213                         }
1214                 }
1215
1216                 $bar = array();
1217                 $this->addToSidebar( $bar, 'sidebar' );
1218
1219                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1220                 if ( $wgEnableSidebarCache ) {
1221                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1222                 }
1223
1224                 wfProfileOut( __METHOD__ );
1225                 return $bar;
1226         }
1227         /**
1228          * Add content from a sidebar system message
1229          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1230          *
1231          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1232          *
1233          * @param $bar array
1234          * @param $message String
1235          */
1236         function addToSidebar( &$bar, $message ) {
1237                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1238         }
1239
1240         /**
1241          * Add content from plain text
1242          * @since 1.17
1243          * @param $bar array
1244          * @param $text string
1245          * @return Array
1246          */
1247         function addToSidebarPlain( &$bar, $text ) {
1248                 $lines = explode( "\n", $text );
1249
1250                 $heading = '';
1251
1252                 foreach ( $lines as $line ) {
1253                         if ( strpos( $line, '*' ) !== 0 ) {
1254                                 continue;
1255                         }
1256                         $line = rtrim( $line, "\r" ); // for Windows compat
1257
1258                         if ( strpos( $line, '**' ) !== 0 ) {
1259                                 $heading = trim( $line, '* ' );
1260                                 if ( !array_key_exists( $heading, $bar ) ) {
1261                                         $bar[$heading] = array();
1262                                 }
1263                         } else {
1264                                 $line = trim( $line, '* ' );
1265
1266                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1267                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1268                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1269                                         if ( count( $line ) !== 2 ) {
1270                                                 // Second sanity check, could be hit by people doing
1271                                                 // funky stuff with parserfuncs... (bug 33321)
1272                                                 continue;
1273                                         }
1274
1275                                         $extraAttribs = array();
1276
1277                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1278                                         if ( $msgLink->exists() ) {
1279                                                 $link = $msgLink->text();
1280                                                 if ( $link == '-' ) {
1281                                                         continue;
1282                                                 }
1283                                         } else {
1284                                                 $link = $line[0];
1285                                         }
1286                                         $msgText = $this->msg( $line[1] );
1287                                         if ( $msgText->exists() ) {
1288                                                 $text = $msgText->text();
1289                                         } else {
1290                                                 $text = $line[1];
1291                                         }
1292
1293                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1294                                                 $href = $link;
1295
1296                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1297                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1298                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1299                                                         $extraAttribs['rel'] = 'nofollow';
1300                                                 }
1301
1302                                                 global $wgExternalLinkTarget;
1303                                                 if ( $wgExternalLinkTarget) {
1304                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1305                                                 }
1306                                         } else {
1307                                                 $title = Title::newFromText( $link );
1308
1309                                                 if ( $title ) {
1310                                                         $title = $title->fixSpecialName();
1311                                                         $href = $title->getLinkURL();
1312                                                 } else {
1313                                                         $href = 'INVALID-TITLE';
1314                                                 }
1315                                         }
1316
1317                                         $bar[$heading][] = array_merge( array(
1318                                                 'text' => $text,
1319                                                 'href' => $href,
1320                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1321                                                 'active' => false
1322                                         ), $extraAttribs );
1323                                 } else {
1324                                         continue;
1325                                 }
1326                         }
1327                 }
1328
1329                 return $bar;
1330         }
1331
1332         /**
1333          * Should we load mediawiki.legacy.wikiprintable?  Skins that have their own
1334          * print stylesheet should override this and return false.  (This is an
1335          * ugly hack to get Monobook to play nicely with OutputPage::headElement().)
1336          *
1337          * @return bool
1338          */
1339         public function commonPrintStylesheet() {
1340                 return true;
1341         }
1342
1343         /**
1344          * Gets new talk page messages for the current user.
1345          * @return MediaWiki message or if no new talk page messages, nothing
1346          */
1347         function getNewtalks() {
1348                 $out = $this->getOutput();
1349
1350                 $newtalks = $this->getUser()->getNewMessageLinks();
1351                 $ntl = '';
1352
1353                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1354                         $userTitle = $this->getUser()->getUserPage();
1355                         $userTalkTitle = $userTitle->getTalkPage();
1356
1357                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1358                                 $newMessagesLink = Linker::linkKnown(
1359                                         $userTalkTitle,
1360                                         $this->msg( 'newmessageslink' )->escaped(),
1361                                         array(),
1362                                         array( 'redirect' => 'no' )
1363                                 );
1364
1365                                 $newMessagesDiffLink = Linker::linkKnown(
1366                                         $userTalkTitle,
1367                                         $this->msg( 'newmessagesdifflink' )->escaped(),
1368                                         array(),
1369                                         array( 'diff' => 'cur' )
1370                                 );
1371
1372                                 $ntl = $this->msg(
1373                                         'youhavenewmessages',
1374                                         $newMessagesLink,
1375                                         $newMessagesDiffLink
1376                                 )->text();
1377                                 # Disable Squid cache
1378                                 $out->setSquidMaxage( 0 );
1379                         }
1380                 } elseif ( count( $newtalks ) ) {
1381                         // _>" " for BC <= 1.16
1382                         $sep = str_replace( '_', ' ', $this->msg( 'newtalkseparator' )->escaped() );
1383                         $msgs = array();
1384
1385                         foreach ( $newtalks as $newtalk ) {
1386                                 $msgs[] = Xml::element(
1387                                         'a',
1388                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1389                                 );
1390                         }
1391                         $parts = implode( $sep, $msgs );
1392                         $ntl = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1393                         $out->setSquidMaxage( 0 );
1394                 }
1395
1396                 return $ntl;
1397         }
1398
1399         /**
1400          * Get a cached notice
1401          *
1402          * @param $name String: message name, or 'default' for $wgSiteNotice
1403          * @return String: HTML fragment
1404          */
1405         private function getCachedNotice( $name ) {
1406                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1407
1408                 wfProfileIn( __METHOD__ );
1409
1410                 $needParse = false;
1411
1412                 if( $name === 'default' ) {
1413                         // special case
1414                         global $wgSiteNotice;
1415                         $notice = $wgSiteNotice;
1416                         if( empty( $notice ) ) {
1417                                 wfProfileOut( __METHOD__ );
1418                                 return false;
1419                         }
1420                 } else {
1421                         $msg = $this->msg( $name )->inContentLanguage();
1422                         if( $msg->isDisabled() ) {
1423                                 wfProfileOut( __METHOD__ );
1424                                 return false;
1425                         }
1426                         $notice = $msg->plain();
1427                 }
1428
1429                 // Use the extra hash appender to let eg SSL variants separately cache.
1430                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1431                 $cachedNotice = $parserMemc->get( $key );
1432                 if( is_array( $cachedNotice ) ) {
1433                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1434                                 $notice = $cachedNotice['html'];
1435                         } else {
1436                                 $needParse = true;
1437                         }
1438                 } else {
1439                         $needParse = true;
1440                 }
1441
1442                 if ( $needParse ) {
1443                         $parsed = $this->getOutput()->parse( $notice );
1444                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1445                         $notice = $parsed;
1446                 }
1447
1448                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1449                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1450                 wfProfileOut( __METHOD__ );
1451                 return $notice;
1452         }
1453
1454         /**
1455          * Get a notice based on page's namespace
1456          *
1457          * @return String: HTML fragment
1458          */
1459         function getNamespaceNotice() {
1460                 wfProfileIn( __METHOD__ );
1461
1462                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1463                 $namespaceNotice = $this->getCachedNotice( $key );
1464                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1465                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1466                 } else {
1467                         $namespaceNotice = '';
1468                 }
1469
1470                 wfProfileOut( __METHOD__ );
1471                 return $namespaceNotice;
1472         }
1473
1474         /**
1475          * Get the site notice
1476          *
1477          * @return String: HTML fragment
1478          */
1479         function getSiteNotice() {
1480                 wfProfileIn( __METHOD__ );
1481                 $siteNotice = '';
1482
1483                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1484                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1485                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1486                         } else {
1487                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1488                                 if ( !$anonNotice ) {
1489                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1490                                 } else {
1491                                         $siteNotice = $anonNotice;
1492                                 }
1493                         }
1494                         if ( !$siteNotice ) {
1495                                 $siteNotice = $this->getCachedNotice( 'default' );
1496                         }
1497                 }
1498
1499                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1500                 wfProfileOut( __METHOD__ );
1501                 return $siteNotice;
1502         }
1503
1504         /**
1505          * Create a section edit link.  This supersedes editSectionLink() and
1506          * editSectionLinkForOther().
1507          *
1508          * @param $nt      Title  The title being linked to (may not be the same as
1509          *   $wgTitle, if the section is included from a template)
1510          * @param $section string The designation of the section being pointed to,
1511          *   to be included in the link, like "&section=$section"
1512          * @param $tooltip string The tooltip to use for the link: will be escaped
1513          *   and wrapped in the 'editsectionhint' message
1514          * @param $lang    string Language code
1515          * @return         string HTML to use for edit link
1516          */
1517         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1518                 // HTML generated here should probably have userlangattributes
1519                 // added to it for LTR text on RTL pages
1520                 $attribs = array();
1521                 if ( !is_null( $tooltip ) ) {
1522                         # Bug 25462: undo double-escaping.
1523                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1524                         $attribs['title'] = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'replaceafter' ), $tooltip );
1525                 }
1526                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1527                         $attribs,
1528                         array( 'action' => 'edit', 'section' => $section ),
1529                         array( 'noclasses', 'known' )
1530                 );
1531
1532                 # Run the old hook.  This takes up half of the function . . . hopefully
1533                 # we can rid of it someday.
1534                 $attribs = '';
1535                 if ( $tooltip ) {
1536                         $attribs = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'escape', 'replaceafter' ), $tooltip );
1537                         $attribs = " title=\"$attribs\"";
1538                 }
1539                 $result = null;
1540                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1541                 if ( !is_null( $result ) ) {
1542                         # For reverse compatibility, add the brackets *after* the hook is
1543                         # run, and even add them to hook-provided text.  (This is the main
1544                         # reason that the EditSectionLink hook is deprecated in favor of
1545                         # DoEditSectionLink: it can't change the brackets or the span.)
1546                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1547                         return "<span class=\"editsection\">$result</span>";
1548                 }
1549
1550                 # Add the brackets and the span, and *then* run the nice new hook, with
1551                 # clean and non-redundant arguments.
1552                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1553                 $result = "<span class=\"editsection\">$result</span>";
1554
1555                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1556                 return $result;
1557         }
1558
1559         /**
1560          * Use PHP's magic __call handler to intercept legacy calls to the linker
1561          * for backwards compatibility.
1562          *
1563          * @param $fname String Name of called method
1564          * @param $args Array Arguments to the method
1565          * @return mixed
1566          */
1567         function __call( $fname, $args ) {
1568                 $realFunction = array( 'Linker', $fname );
1569                 if ( is_callable( $realFunction ) ) {
1570                         return call_user_func_array( $realFunction, $args );
1571                 } else {
1572                         $className = get_class( $this );
1573                         throw new MWException( "Call to undefined method $className::$fname" );
1574                 }
1575         }
1576
1577 }